Fly-screen.



No. 885,597. PATENTED APR. 21, 1908.

' c, N. FRIZ.

FLY SCREEN...

APPLIOATION I'ILED MAY13,1907.

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No. 885,597. PATENTED APR. 21, 1908. G. N: FRIZ.

FLY SCREEN.

APPLICATION FILED MAY13,1907.

2 SHEETS-SHEET 2.

nu: NORR! PETERS sHING'm CLYDE N. FRIZ, OF BALTIMORE, MARYLAND.

FLY-SCREEN.

Specification of Letters Patent.

Patented April 21, 1908.

Application filed May 13, 1907. Serial No. 373,372.

window screen.

One object of the invention is to generally improve the construction of screens render them more durable and more effective in their operation.

Another object of the invention is to provide an improved construction of screen whereby to direct or permit the flies or other insects to readily find an escape from the interior of a room to the outer air and to pre vent their return through the screen.

Another object of the invention is to improve the irame work of the screen in order that the same may be rigid; not affected by the elements and which will permit the ready attachment of the wire mesh under tension.

With these and other objects in view the invention is illustrated in the accompanying drawings in which,-

Figure 1 illustrates an inner side elevation of a screen constructed in accordance with the invention. Fig. 2 shows a horizontal cross-sectional view,the section being taken on the line 22 of Fig. 1 looking in the direction of the darts toward the upper rail of the screen. Fig. 3 illustrates an outer side elevation of the upper portion of the screen.

Fig. 4 shows a cross-sectional view through one of the side channel bars of the screen,- the section being taken on the line 44 of Fig. 1. Fig- 5 illustrates a similar view through the bottom bar,the section being taken on the line 5-5 of Fig. 1. Fig. 6 shows a cross-sectional view through the upper bar or rail,this section being taken on the line 66 of Fig. 3. Fig. 7 illustrates a longitudinal section through the upper rail and the section being taken on the line 77 of Fi 8. Fig. 8 shows a cross-sectional detail through the center of the upper rail, the section being taken on the line SS of Fig. 3. Fig. 9 illustrates a longitudinal section through one corner of the frame, and

Fig. 10, shows perspective views of the detached side and cross rails.

Referring to the drawings by numerals, 1, designates the bottom cross bar of the screen frame; 2, the top cross bar thereof and 3 and 4 the side bars respectively which connect the top and bottom cross bars. All of these parts are formed of metal channel bars which makes them stiff and rigid and avoids warping and twisting when exposed to the weather as in the case of wood.

The bottom crossbar, 1, comprises two channel bars, 5, and 6,-the bar, 5, having a bottom wall, 7, and parallel side walls, 8, which project upwardly from opposite sides of the bottom wall and the upper side of this bar, 5, between the side walls being open and thus forming a U-shaped bar. The bar, 6, is also of a U-shape but is inverted with respect to the bar, 5, so that its side walls, 9, will extend down at the inner side of the walls, 8, of the bar, 5, as clearly seen in Figs. 5 and, 10, so that said bars, 5 and 6, may telescope.

In order to readily secure the metal hook or-lift, 10, to the bottom bar I provide a lift with a hook formation, 11, at its bottom edge and this hook projects under and around the lower edge of one of the walls, 9, of the bar, 6, so as to prevent its withdrawal. In a similar manner I secure the wire mesh screen, 12, by bending its lower marginal edge around the lower edge of the wall, 9, prior to fitting the bar, 6, into the channel bar, 5. When the two bars, 5 and, 6, are brought together in a telescoping manner the wire screen and the lift, 10, will be securely held in place. The bars, 5, and, 6, are both provided at each end with a notch, 13, which is made use of when the bottom and side bars are brought together for engagement as will presently be described.

The opposite side bars, 3, and 4, are constructed like the bottom bar, 5, with the exception that the channel bar, 14, into which the channel bar, 15, telescopes, is provided at its outer vertical edge with a groove or channel, 16, which engages the ordinary well known head on the window frame to guide it durin vertical movement.

The vertical marginal edges of the Wire screen are secured between these telescoping channel bars, 14, and 15, exactly as has been described in connection with the bottom bar. It will be readily seen that by hooking the marginal edge of the wire screen over the edges of the inner channel bars the screen may be readily and uniformly stretched by the telescoping of the channels.

By referring to Figs. 9 and 10, it will be clearly seen how the bottom and side bars will interlock or engage. When brought to gether the walls, 8, and, 9, of the lower bar will project between the walls of the channel bars, 14 and 15, which together form the side bar and the notch, 13, of the bar, 5, W111 register with the vertical groove or channel, 16, in the side bar while the notch of the bar, 6, will receive the channel bar, 15, of the side bar. After the side and bottom bars have been fitted together they may be secured in any desirable manner, either by solder or by riveting them together.

As a result of the hollow channel formation of the bars I am enabled to utilize one or more of'the bars for the purpose of allowing flies or other insects to escape from the inner to the outer side of the screen and in the present instance I so utilize the upper cross bar, 2.

By reference to Figs. 2, 3, 6, 7, and 8, it will be seen that the upper bar is also constructed of two telescoping channel bars, 17 and 18, and that the bar, 17 at the outer side of the screen is provided with a narrow flange or wall, 19, while at the inner side of the screen said bar has a broader flange or wall, 20. The inner bar, 18, fits within the bar, 17, exactly as described with respect to the side and bottom bars of the screen, and this inner bar, as can be seen by reference to Figs. 2, 3, and 6, is provided with a plurality of openings, 21. These openings are formed so as to be located partly in the bottom wall, 22,- and partly in the outer side wall, 23, of said inner bar, 18. The object in so locating the openings is to permit the flies or other insects to pass through said openings from the wire screen, 12, and in order to attract them into the interior of said channel bar the light is permitted to enter said channel bar through that portion of said openings that extend into the outer side wall, 23. It is for this reason that the flange or wall, 19 is made narrow for otherwise it would cover a part of said openings.

' After the flies or other insects have passed the openings 21, they will move along through the interior of the bar, 2, seeking an outlet and as they approach the center of the said bar they will be attracted by light entering the interior of the bar through a large or an elongated central opening, 24, in said side Wall, 23. This elongated opening is preferably located midway between the opposite eFnds of the upper bar, 2, as plainly seen in On the interior of the channel bar, 18, and adjacent the said elongated opening 24-, I secure a plate which is provided with inclined lower portions, 25, and reversely inclined u per portions, 26, with an opening, 27, at tl ie bend between said inclined portions as clearly shown in Figs. 7, and 8. In the pres ent instance a single plate is so bent as to form two lower inclined portions, 25, and two upper reversely inclined portions, 26, so as to produce a central compartment, 28, between said inclined plates, the object being to permit the flies or other insects to move up the lower inclined ortions; pass through the openings, 27, and t ius enter the central compartment, 28, from which they will find difliculty in returning.

Openings, 29, are provided in the wire screen and these openings communicate with the outer side of the wire screen so as to per mit the flies or other insects to pass from the compartment, 28, to the outer side of the screen.

It will be noted by reference to Fig. 1 that looking at the completed screen from the inside the appearance will merely be that of any ordinary screen and the openings and other features employed in the construction of the upper bar, 2, will not be prominent.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is,

1. A screen comprising a frame having grooved side bars; a bottom bar; and a hollow top bar which latter is provided with a plurality of openings in its bottom wall and said hollow top bar having openings leading from its interior to the exterior side of the screen, and a wire mesh attached to all of said bars.

2. A screen comprising a frame having top, bottom and side bars and the top bar being hollow and having a pluralit of openings in its bottom wall and also aving an opening in its outer wall means extending crosswise in said hollow top bar between the inner wall openings and the outer wall opening thereof to intercept insects in passing from the outer to the inner side of the screen, and a wire mesh attached to said bars.

3. A screen comprising a frame having grooved side bars, a bottom bar and a hollow top bar with a wire mesh attached to said bars, and said hollow top bar having a plurality of openings in its bottom wall and also having an opening that communicates with the outer side of the wire mesh, and a perforated partition in said hollow bar between the openings in the inner wall .and the opening in said outer wall.

4. A screen com rising a frame having top, bottom and site bars, and one of said bars being hollow to form an interior passage and having a central opening and openings at the side of the central opening, perforated partitions in said passage between the central and side openings and a wire mesh attached to saidbars and having an opening to the exterior adjacent the perforated partitions.

5. A screen comprising a frame havin top, bottom and side bars and one of sai bars being hollow to form an interior passage and having an opening in its outer wall leading to the exterior and openings in an inner Wall leading to the interior; perforated partitions in said assage between the opening in the outer wail and the openings in the inner wall, and a wire mesh screen attached to said frame and having an opening that communicates with the passage of the hollow bar between said partitions.

6. A screen having a frame composed of top, bottom and side rails and each rail being formed by telescoping outer and inner channel bars,-the outer channel bars of the side rails havin longitudinal central grooves and the channel bars of the top and bottom rails being notched at their ends and the walls at said notched end fitting between the channel bars of the side rails, and a wire mesh having its marginal edges clamped between the channel bars of each rail.

7. A screen comprising a frame having telescoping channel bars, a lifting device attached to the bottom rail of the frame,-said lifting device'having a hook at its inner end to engage the edge of the inner channel bar, a 30 wire mesh having its marginal edge hooked under said channel bar and the outer channel bar clamping said wire mesh and lifting device against the inner channel bar.

In testimony whereof I affix my signature 35 in presence of two witnesses.

CLYDE N. FRIZ. WVitnesses:

CHARLES B. MANN,Jr., HARRY GILL. 

